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Property, plant and equipment and construction in progress (Tables) | 12 Months Ended
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Dec. 31, 2019
Property, plant and equipment and construction in progress |
Schedule of Property, plant and equipment and construction in progress |
|  | December 31,
|  | 2019 |  | 2018
Land |  | $ | 3,566,537 |  | $ | 3,435,361
Buildings |  |  | 23,176,106 |  |  | 19,829,575
Plant and equipment |  |  | 64,840,636 |  |  | 61,777,836
Distribution system |  |  | 36,538,614 |  |  | 36,057,078
Office furniture, fixtures and equipment |  |  | 3,061,315 |  |  | 3,635,184
Vehicles |  |  | 1,582,053 |  |  | 1,431,719
Leasehold improvements |  |  | 272,092 |  |  | 244,221
Lab equipment |  |  | 14,958 |  |  | 27,795
|  |  | 133,052,311 |  |  | 126,438,769
Less accumulated depreciation |  |  | 71,803,332 |  |  | 67,557,951
Property, plant and equipment, net |  | $ | 61,248,979 |  | $ | 58,880,818
Construction in progress |  | $ | 1,335,597 |  | $ | 6,015,043

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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